Talking to 433Mhz relay board

Hi,

I’m looking to talk to multiple 433Mhz relay boards, to control items around the house, with the Arduino as the transmitter instead of a key fob.

Is there an easy way to talk to these boards when in “learning mode”, to connect with them/multiples?

A lot of what I can find is on the Arduino being a receiver and a key fob as the transmitter.

Thanks,

Graham

I use the Sonoff RF Bridge with Tasmota firmware to receive 433 MHz sensors (switches, buttons, etc). It has the ability to simulate button presses, but I haven't used that feature.